UIMA-4069 DUCC Job Driver (JD) system classpath

Preemption works!

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1645690 13f79535-47bb-0310-9956-ffa450edef68
UIMA-4066 fixed NPE

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1645719 13f79535-47bb-0310-9956-ffa450edef68
UIMA-4142 Better recovery if node-to-nodepool assignments change.


git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1645720 13f79535-47bb-0310-9956-ffa450edef68